signs of life.. (nw)

src/mame/drivers/megaphx.c

@@ -12,6 +12,11 @@
   TMS34010FNL-40
   TMP82C55AP-2
  
+  Bt478KPJ35  Palette / RAMDAC
+
+  Actel A1010A-PL68C  (custom blitter maybe?)
+
+
  Sub / Sound board:
 
   ST Z8430AB1
@@ -30,7 +35,7 @@
 #include "cpu/tms34010/tms34010.h"
 #include "cpu/m68000/m68000.h"
 #include "cpu/z80/z80.h"
-
+#include "video/ramdac.h"
 
 class megaphx_state : public driver_device
 {
@@ -38,24 +43,63 @@ public:
 	megaphx_state(const machine_config &mconfig, device_type type, const char *tag)
 		: driver_device(mconfig, type, tag),
 		m_maincpu(*this, "maincpu"),
-		m_mainram(*this, "mainram")
+		m_mainram(*this, "mainram"),
+		m_vram(*this, "vram")
 	{ }
 
 	required_device<cpu_device> m_maincpu;
 	required_shared_ptr<UINT16> m_mainram;
+	required_shared_ptr<UINT16> m_vram;
 
 
 	DECLARE_DRIVER_INIT(megaphx);
 	DECLARE_MACHINE_RESET(megaphx);
 
+
+
+	DECLARE_READ16_MEMBER(megaphx_60004_r);
+	DECLARE_READ16_MEMBER(megaphx_50002_r);
+
+	DECLARE_READ16_MEMBER(tms_host_r);
+	DECLARE_WRITE16_MEMBER(tms_host_w);
+
 };
 
+READ16_MEMBER(megaphx_state::megaphx_60004_r)
+{
+	return rand();
+}
+
+READ16_MEMBER(megaphx_state::megaphx_50002_r)
+{
+	return rand();
+}
+
+READ16_MEMBER(megaphx_state::tms_host_r)
+{
+	return tms34010_host_r(machine().device("tms"), offset);
+}
+
+
+WRITE16_MEMBER(megaphx_state::tms_host_w)
+{
+	tms34010_host_w(machine().device("tms"), offset, data);
+}
+
+
+
 static ADDRESS_MAP_START( megaphx_68k_map, AS_PROGRAM, 16, megaphx_state )
 //	AM_RANGE(0x000000, 0x0000ff) AM_ROM
 	AM_RANGE(0x000000, 0x00ffff) AM_RAM AM_SHARE("mainram")
 
-	AM_RANGE(0x040000, 0x040007) AM_WRITENOP
+	AM_RANGE(0x040000, 0x040007) AM_READWRITE(tms_host_r, tms_host_w)
-	AM_RANGE(0x060004, 0x060005) AM_READNOP
+
+	AM_RANGE(0x050002, 0x050003) AM_READ(megaphx_50002_r)
+//	AM_RANGE(0x050000, 0x050001) AM_DEVWRITE8("ramdac",ramdac_device,index_w,0x00ff)
+//	AM_RANGE(0x050002, 0x050003) AM_DEVREADWRITE8("ramdac",ramdac_device,pal_r,pal_w,0x00ff)
+//	AM_RANGE(0x050006, 0x050007) AM_DEVWRITE8("ramdac",ramdac_device,index_r_w,0x00ff)
+
+	AM_RANGE(0x060004, 0x060005) AM_READ(megaphx_60004_r)
 	AM_RANGE(0x060006, 0x060007) AM_WRITENOP
 
 	
@@ -65,7 +109,13 @@ ADDRESS_MAP_END
 
 
 static ADDRESS_MAP_START( megaphx_tms_map, AS_PROGRAM, 16, megaphx_state )
-	AM_RANGE(0xffe00000, 0xffffffff) AM_ROM AM_REGION("user0", 0)
+
+	AM_RANGE(0x00000000, 0x001fffff) AM_RAM // vram?
+	AM_RANGE(0x00100000, 0x002fffff) AM_RAM AM_SHARE("vram") // vram?
+	AM_RANGE(0x00300000, 0x003fffff) AM_RAM
+	AM_RANGE(0x04000000, 0x040000ff) AM_WRITENOP
+	AM_RANGE(0xc0000000, 0xc00001ff) AM_READWRITE_LEGACY(tms34010_io_register_r, tms34010_io_register_w)
+	AM_RANGE(0xffc00000, 0xffffffff) AM_RAM
 ADDRESS_MAP_END
 
 static ADDRESS_MAP_START( sound_map, AS_PROGRAM, 8, megaphx_state )
@@ -82,6 +132,23 @@ ADDRESS_MAP_END
 
 static void megaphx_scanline(screen_device &screen, bitmap_rgb32 &bitmap, int scanline, const tms34010_display_params *params)
 {
+	megaphx_state *state = screen.machine().driver_data<megaphx_state>();
+
+	UINT16 *vram = &state->m_vram[(params->rowaddr << 8) & 0x1ff00];
+	UINT32 *dest = &bitmap.pix32(scanline);
+
+	const pen_t *paldata = screen.machine().pens;
+
+	int coladdr = params->coladdr;
+	int x;
+
+	for (x = params->heblnk; x < params->hsblnk; x += 2)
+	{
+		UINT16 pixels = vram[coladdr++ & 0xff];
+		dest[x + 0] = paldata[pixels & 0xff];
+		dest[x + 1] = paldata[pixels >> 8];
+	}
+
 }
 
 static void megaphx_to_shiftreg(address_space &space, UINT32 address, UINT16 *shiftreg)
@@ -96,15 +163,24 @@ MACHINE_RESET_MEMBER(megaphx_state,megaphx)
 {
 }
 
+static void m68k_gen_int(device_t *device, int state)
+{
+	megaphx_state *drvstate = device->machine().driver_data<megaphx_state>();
+	if (state) drvstate->m_maincpu->set_input_line(4, ASSERT_LINE);
+	else drvstate->m_maincpu->set_input_line(4, CLEAR_LINE);
+//	printf("interrupt %d\n", state);
+}
+
+
 static const tms34010_config tms_config_megaphx =
 {
-	FALSE,                          /* halt on reset */
+	TRUE,                          /* halt on reset */
 	"screen",                       /* the screen operated on */
 	XTAL_40MHz/6,                   /* pixel clock */
 	1,                              /* pixels per clock */
 	NULL,                           /* scanline callback (indexed16) */
 	megaphx_scanline,              /* scanline callback (rgb32) */
-	NULL,                           /* generate interrupt */
+	m68k_gen_int,                   /* generate interrupt */
 	megaphx_to_shiftreg,           /* write to shiftreg function */
 	megaphx_from_shiftreg          /* read from shiftreg function */
 };
@@ -114,6 +190,16 @@ static const tms34010_config tms_config_megaphx =
 static INPUT_PORTS_START( megaphx )
 INPUT_PORTS_END
 
+static ADDRESS_MAP_START( ramdac_map, AS_0, 8, megaphx_state )
+	AM_RANGE(0x000, 0x3ff) AM_DEVREADWRITE("ramdac",ramdac_device,ramdac_pal_r,ramdac_rgb888_w)
+ADDRESS_MAP_END
+
+static RAMDAC_INTERFACE( ramdac_intf )
+{
+	1
+};
+
+
 static MACHINE_CONFIG_START( megaphx, megaphx_state )
 
 	MCFG_CPU_ADD("maincpu", M68000, 8000000) // ??  can't read xtal due to reflections, CPU is an 8Mhz part
@@ -121,10 +207,9 @@ static MACHINE_CONFIG_START( megaphx, megaphx_state )
 //	MCFG_CPU_VBLANK_INT_DRIVER("screen", megaphx_state,  irq6_line_hold)
 
 
-	MCFG_CPU_ADD("tmscpu", TMS34010, XTAL_40MHz)
+	MCFG_CPU_ADD("tms", TMS34010, XTAL_40MHz)
 	MCFG_CPU_CONFIG(tms_config_megaphx)
 	MCFG_CPU_PROGRAM_MAP(megaphx_tms_map)
-	MCFG_DEVICE_DISABLE()
 
 	MCFG_CPU_ADD("audiocpu", Z80, 4000000) // unk freq
 	MCFG_CPU_PROGRAM_MAP(sound_map)
@@ -137,7 +222,12 @@ static MACHINE_CONFIG_START( megaphx, megaphx_state )
 
 	MCFG_SCREEN_ADD("screen", RASTER)
 	MCFG_SCREEN_RAW_PARAMS(XTAL_40MHz/6, 424, 0, 320, 262, 0, 240)
-	MCFG_SCREEN_UPDATE_DEVICE("tmscpu", tms34010_device, tms340x0_rgb32)
+	MCFG_SCREEN_UPDATE_DEVICE("tms", tms34010_device, tms340x0_rgb32)
+
+	MCFG_PALETTE_LENGTH(256)
+
+	MCFG_RAMDAC_ADD("ramdac", ramdac_intf, ramdac_map)
+
 MACHINE_CONFIG_END
 
 DRIVER_INIT_MEMBER(megaphx_state,megaphx)
@@ -160,8 +250,6 @@ ROM_START( megaphx )
 	ROM_LOAD16_BYTE( "mph4.u36", 0x880001, 0x20000, CRC(c8e0725e) SHA1(b3af315b9a94a692e81e0dbfd4035036c2af4f50) )
 	ROM_LOAD16_BYTE( "mph5.u25", 0x880000, 0x20000, CRC(c95ccb69) SHA1(9d14cbfafd943f6ff461a7f373170a35e36eb695) )
 
-	ROM_REGION16_LE( 0x100000, "user0", ROMREGION_ERASE00 )
-	
 	ROM_REGION( 0x200000, "user2", 0 )
 	ROM_LOAD( "sonido_mph1.u39", 0x000000, 0x20000, CRC(f5e65557) SHA1(5ae759c2bcef96fbda42f088c02b6dec208030f3) )
 	ROM_LOAD( "sonido_mph2.u38", 0x000000, 0x20000, CRC(7444d0f9) SHA1(9739b48993bccea5530533b67808d13d6155ffe3) )